CVE-2026-31027

CRITICAL

TOTOlink A3600R v5.9c.4959 - Buffer Overflow

Title source: llm

Description

TOTOlink A3600R v5.9c.4959 contains a buffer overflow vulnerability in the setAppEasyWizardConfig interface of /lib/cste_modules/app.so. The vulnerability occurs because the rootSsid parameter is not properly validated for length, allowing remote attackers to trigger a buffer overflow, potentially leading to arbitrary code execution or denial of service.

References (1)

https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A3600R/rootSsid-setAppEasyWizardConfig.md

View Writeup ZIP pw:eip

Scores

CVSS v3 9.8

EPSS 0.0078

EPSS Percentile 73.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-120

Status published

Products (1)

totolink/a3600r_firmware 5.9c.4959

Published Apr 01, 2026

Tracked Since Apr 01, 2026